Help With Drive Shaft Vibration

Well comeing home from work thursday I got on my truck just for fun and broke the rear drive shaft. So I went to the junk yard and got me another one the carrier bearing is good replaced all the u joints and im still getting some vibration at 30mph its real hard vibration and up to about 80mph u can feal it preety good. Everything is bolted on rite drive shaft is strait the only thing that I have noticed is that the rear drive shaft at the rear end u joint u can move the drive shaft side to side and the clips that hold the u joint are nice and tight. Ive gone thru at least about 10 u joints and they all do the same thing from autozone,oreily,and advanced auto parts. Does anyone have any ideas on what this could be thanx?

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I'm curious about this as well. I've got a one piece and I've been through 5 u-joints up front and 2 in back. All from either auto zone, advanced, or oreillys. One was from Rock Auto.

did u get the u joints that have the c clip..?
the u joints i used had c clips that went in the inside of the little brackets that go bolted to tge rear end

from what i remember lastime they gave me the wrong u joint and i had the same problem. two of the 'arms' were the same size and the other two we slightly smaller.
i just changed the u joint for the driveshaft that goes to the front the part # was 2-3011DG
looks exactly like the one that goes to the back

I've always gotten the ones w/ the c-clips. I had that "arm" problem before too, I ended up making about 5 different trips to Advanced before I got the right one.

Well i hace the ones that have the c clips on the inside there installed corectly and everything but itstill move back and forth i dont know what to do anymore????

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Originally Posted by 1fstsierra

Well i hace the ones that have the c clips on the inside there installed corectly and everything but itstill move back and forth i dont know what to do anymore????

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are all 4 of the 'arms' the same size?

Did you get the DS balanced before you put it on?

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Originally Posted by cjriojas

Did you get the DS balanced before you put it on?

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Do i have too? Even though it came off another truck?

you dont always know what the other truck has been through. Its a precautionary measure to get it balanced just in case.